Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data
Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best...
Published in: | Journal of Geophysical Research: Earth Surface |
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Language: | English |
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2012
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ftvliz:oai:oma.vliz.be:219512 2023-05-15T13:33:16+02:00 Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data Pattyn, F. Matsuoka, K. Callens, D. Conway, H. Depoorter, M. Docquier, D. Hubbard, B. Samyn, D. Tison, J.-L. 2012 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=219512 en eng info:eu-repo/semantics/altIdentifier/wos/000309839800001 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.1029/2011JF002154 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=219512 info:eu-repo/semantics/restrictedAccess %3Ci%3EJ.+Geophys.+Res.+117%28F04008%29%3C%2Fi%3E%3A+8.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.1029%2F2011JF002154%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.1029%2F2011JF002154%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftvliz https://doi.org/10.1029/2011JF002154 2022-05-01T09:50:12Z Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best fit by including basal melting of at least 15 cm a -1 . This rate of melting is low compared with rates observed on larger ice shelves in both West and East Antarctica. Ice cores extracted from a rift system close to the ice-rise promontory show several meters of marine ice accreted beneath the shelf. These observations of low rates of basal melting, and limited distribution of accreted marine ice suggest that either Antarctic surface water may reach the ice shelf base or that circulation beneath the shelf is likely dominated by the production of high salinity shelf water rather than the incursion of circumpolar deep water, implying a weak sub-shelf circulation system here. Many of the ice shelves located along the coast of Dronning Maud Land are, like Roi Baudouin Ice Shelf, characterized by frequent ice rises and promontories. Therefore, it is highly likely that these are also of shallow bathymetry and are subject to similarly weak side-shelf basal melting and refreezing. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic East Antarctica Dronning Maud Land Roi Baudouin ENVELOPE(24.461,24.461,-70.438,-70.438) Journal of Geophysical Research: Earth Surface 117 F4 n/a n/a |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Ice-penetrating radar profiles across the grounding line of a small ice-rise promontory located within the Roi Baudouin Ice Shelf in the Dronning Maud Land sector of East Antarctica show downward dipping englacial radar-detected reflectors. Model results indicate that this reflector pattern is best fit by including basal melting of at least 15 cm a -1 . This rate of melting is low compared with rates observed on larger ice shelves in both West and East Antarctica. Ice cores extracted from a rift system close to the ice-rise promontory show several meters of marine ice accreted beneath the shelf. These observations of low rates of basal melting, and limited distribution of accreted marine ice suggest that either Antarctic surface water may reach the ice shelf base or that circulation beneath the shelf is likely dominated by the production of high salinity shelf water rather than the incursion of circumpolar deep water, implying a weak sub-shelf circulation system here. Many of the ice shelves located along the coast of Dronning Maud Land are, like Roi Baudouin Ice Shelf, characterized by frequent ice rises and promontories. Therefore, it is highly likely that these are also of shallow bathymetry and are subject to similarly weak side-shelf basal melting and refreezing. |
format |
Article in Journal/Newspaper |
author |
Pattyn, F. Matsuoka, K. Callens, D. Conway, H. Depoorter, M. Docquier, D. Hubbard, B. Samyn, D. Tison, J.-L. |
spellingShingle |
Pattyn, F. Matsuoka, K. Callens, D. Conway, H. Depoorter, M. Docquier, D. Hubbard, B. Samyn, D. Tison, J.-L. Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
author_facet |
Pattyn, F. Matsuoka, K. Callens, D. Conway, H. Depoorter, M. Docquier, D. Hubbard, B. Samyn, D. Tison, J.-L. |
author_sort |
Pattyn, F. |
title |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_short |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_full |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_fullStr |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_full_unstemmed |
Melting and refreezing beneath Roi Baudouin Ice Shelf (East Antarctica) inferred from radar, GPS, and ice core data |
title_sort |
melting and refreezing beneath roi baudouin ice shelf (east antarctica) inferred from radar, gps, and ice core data |
publishDate |
2012 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=219512 |
long_lat |
ENVELOPE(24.461,24.461,-70.438,-70.438) |
geographic |
Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
geographic_facet |
Antarctic East Antarctica Dronning Maud Land Roi Baudouin |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core Ice Shelf Ice Shelves |
op_source |
%3Ci%3EJ.+Geophys.+Res.+117%28F04008%29%3C%2Fi%3E%3A+8.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.1029%2F2011JF002154%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.1029%2F2011JF002154%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000309839800001 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.1029/2011JF002154 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=219512 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2011JF002154 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
117 |
container_issue |
F4 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766040722735104000 |